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Messages - RICH

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6461
General Mach Discussion / Re: backlash help please
« on: March 02, 2009, 10:27:39 PM »
You may need to play some with the shuttle accel. It determines how fast the backlash will be done.
If too fast you may skip steps. Just don't remember as it's been some time ago.

Brett can correct me if wrong. I can change % frorm  50% but never had it over 100%.

RICH
  

6462
General Mach Discussion / Re: What is your trade?
« on: March 02, 2009, 10:10:47 PM »

Hi, my name is RICH and i'm just a boring process engineering designer who has been involved in most aspects of engineering
design and construction of chemical plants. The experience over the years has been very, very diversified, from
conceptual design to full facilities. Hobbies include music, ham radio, cars, woodworking, electronics,engraving, firearms,
hunting, and always wanted to have a house with three rooms; namely a bathroom, dining room,bedroom and a 7 or 8 stall garage
for each of the hobbies i enjoy! They are somewhat seasonal. So it would just seem natural to have a small machine shop and
have fun at CNC as it encompass a piece of my work and other interests. As a hobby i can have just as much fun maching a part,
getting something to work, helping someone out,  or experiencing the sickness called ADD CNC ( Adult Deficit Deficiency Computer
Numerical Control ). The doctor told my family that's it's incurrable and they must learn to live with it!
But you know, it's all in the name. RICH
When i was born my mother named me Richard and everyone called me Rich or Richie. Now when i was an alter boy the pastor
called me Dick and i hated that name since my name is Rich and not some hanging part. But in those days you had to show respect
and little did we know that we would be learning a book called Dick and Jane. ( the Jane i got to know was hot) Anyway, as time went
on the name went back to Richie, but my mother-in-law was proper and always called me Richard. Then i moved to Delaware and everyone
would never call me Rich and only Dick. So i finally accepted the name. Then was tranferred to constructiion in Tennessee and my hardhat
had Dick on the side of it. It didn't take to long at the site to sense that something was wrong as people started calling me pecker.
That ended quickly when i fired a guy. Some time later off to another construction site in Texas only this time Rich was on the side of the
hardhat.Ha, dumb once but not twice! Then i went to the first site staff meeting, was introduced as Rich, but the construction manager asked me
a question post my introduction. He said that when he called my office i would answer the phone as Dick and noticed that my design team called
me Richard and that the guys out in the field called me Rich. He asked what name the staff should address me by? I responded to the "big boss"
that they could call me anything they wish, just don't call me Pecker. You could hear a pin drop in the meeting and after what seemed like an
eternity of silence he responded with "smart ass" and i repsonded with that's fine just don't call me Pecker. He got somewhat disturbed
and once again just said ...give me a name and no smart remark. i repsonded and said Mr. V...... , my last name is fine. Well it was probably
10 years later and I met that manager ( now head of all the construction division for a major company ) at a managers meeting and on seeing me
he asked me to join the group and during conversation always addressed me as Mr. V....... One of the guys at the table asked me what position
i held with the company as someone so up the ladder would address me as Mr.  I said i worked on the Company Board. The guys at the table
 were impressed and remarked how young i was to have such a position in a major company.
 Well the manager leaned over and whispered to me "Drafting Board, Pecker" and i see you have not changed. Manny of the words
are direct qoutes.

RICH   ........and it's all true  :)

6463
LazyCam (Beta) / Re: Important Tip For All Autocad Users
« on: March 02, 2009, 06:12:19 AM »
Appendix "C" in the LAZYTURN Manual which can be found in Members Doc's covers DXF fiile imports
at a high level and would be worth reading. the info applies to Lazycam Turn also in my opinion.
RICH

6464
General Mach Discussion / Re: Problems threading on the lathe
« on: March 01, 2009, 09:03:17 PM »
Here is a G32 code which you can use for testing and it's much easiier to duplicate the
X&Z goofy pass over and over again and variations on the theme without stepping one by one
thru a large program.

RICH

(TEST OF SPINDLE SLOW DOWN)
G0 X1.1 Z-0.1
G0 X1
M98 P1000 L10
M30
O1000
G01 Z-0.1
G32 X0.999 Z-0.0997 F0.076923
G32 X0.999 Z1 F0.076923
G4 P5
G01 X1.1 Z1 F0.076923
G00 X1.1 Z-0.1
G00 X1
(Min decremant being used)
(Decrement = 0.001 pass 2)
G01 Z-0.1
G32 X0.998 Z-0.0994 F0.076923
G32 X0.998 Z1 F0.076923
G01 X1.1 Z1 F0.076923
G00 X1.1 Z-0.1
G00 X1
M99



6465
General Mach Discussion / Re: Problems threading on the lathe
« on: March 01, 2009, 08:54:11 PM »
TrevoH,
May i suggest you just hold off and don't buy anything.
Calc's can be done, heck there are books books written, there are studies by companies for years.
Add a different cuttinig fluid, or cutter and the calc ain't worth poop ( ok, maybe ball park).

RICH

6466
General Mach Discussion / Re: Problems threading on the lathe
« on: March 01, 2009, 07:48:07 PM »
Art,
The first group of comments ( 1st threading pass) was info about each line of code and and just confirms that all
is  working.


The 3 sec is the total elapsed time of "no spindle rotation" /  no spindle index would be recieved by MACH.  
It would be the equivilant of a cutter jammed into the stock. When i turn the spindle back on, Z will continue to move down the threading pass and then return to the start point, but the program just stops and you get the
error message. And the axis locations are right where they should be.

The rpm change ( I can't tell exactly, it's probably from a 100 dn to 30 and back to something near 100),
Did numerous different speed changes, and note that i wasn't interested in some "transition %" ,but rather
trying to see if i could consistantly create the goofy x/z move.
It would be the equivilant of the cutter gradualy slowing down the spindle and then the spindle speeding back up
while cuttiing a thread. It dosen't matter if after the slow down you don't bring up the spindle speed as you will get that goofy x/z move in the next pass. The Z velocity will track / increase or decrease along with the spindle increase or decrease and there is no x change of movement during this period.
If you stop the spindle for 1 sec it just seems like the equivilant of a spindle slow down and speed up.

Note that the spindle speed changes were only done during the actual threading move, after it started and beforee it ended. So those changes have nothing to do with a G00 or G01.  

I'll go a line by line and see what happens. ( ii see Trevor has already done so)
RICH

 

6467
General Mach Discussion / Re: Problems threading on the lathe
« on: March 01, 2009, 07:01:41 PM »
Graham,
That code is as generated out of the wizard. It's a 1-13 just for the convenience of monitoring the axis moves
as i changed spindle speeds for testing. Two G32 lines??, well that goes back a long time, 8 months ago when i first tried threading. Normaly just use the G76.
RICH

6468
General Mach Discussion / Re: Problems threading on the lathe
« on: March 01, 2009, 02:38:07 PM »
Just for info:

Mach Version: R3.042.020
SS PLUG IN: BETA_V015ogb
Lathe threading Wizard: REV 1.17

RICH

6469
General Mach Discussion / Re: Problems threading on the lathe
« on: March 01, 2009, 02:31:52 PM »
ART,
but if that IS true, then the Z MUST go out of position.. Does it?

Not according to the DRO's.
And just measured the Z. It dosen't loose position at all ( start and end points). Even when you do a 3 sec complete
stop of the spindle. For a complete stop it just reeturns to the starting Z postion and threadiing cycle doesn't continue.
You will get the error message if spindle is shut off completely that " no spindle feedback seen in G95....etc."
It dosen't seem to lock up MachTurn as i can rewiind the program and just start all over.

RICH

6470
General Mach Discussion / Re: Problems threading on the lathe
« on: March 01, 2009, 02:06:13 PM »
Art,
Fooling with it as i write. I am trying both G32 and M76 and they are behaving the same to me.
This is what i am seeing when dry running:


(Decrement = 0.001 pass 1)
G01 Z-0.1                                   Z IN POSITION WAITING FOR INDEX TO START THREAD
G32 X0.999 Z-0.0997 F0.076923   INDEX / Z ACCEL TO THREAD START POINT
G32 X0.999 Z1 F0.076923            THE THREADING CUT
G01 X1.1 Z1 F0.076923               RETRACT OUT OF THREAD
G00 X1.1 Z-0.1                            RETURN TO THE X OFFSET & Z START
G00 X1                                       X MOVE TO STOCK DIAMETER

                                                 NOW THE SPINDLE SPEED WIILL BE SLOWED DOWN, LETS
                                                JUST SAY 50% ( 100 RPM DOWN TO 50 ).
 
(Min decremant being used)
(Decrement = 0.001 pass 2)
G01 Z-0.1
G32 X0.998 Z-0.0994 F0.076923
G32 X0.998 Z1 F0.076923            SLOWLY- BRING SPINDLE RPM FROM 100 TO 50 AND BACK TO 100
G01 X1.1 Z1 F0.076923                DURING / OVER THE 1" OF THREADING CUTTING
G00 X1.1 Z-0.1
G00 X1
                                                 SOMETHING WRONG HERE. IF SPINDLE WAS SLOWED TO A STOP FOR
                                                 1 SEC ( 1001 ) THEN PROGRAM CONTINUES. IF SPINDLE IS STOPPED FOR 
                                                 3 SEC ( 1001,1002,1003 ) THEN THE THREADING CYCLE STOPS.
                                                 IF JUST SLOWED DOWN AS NOTED ABOVE YOU GET COMMENT BELOW .
                                                 
(Min decremant being used)
(Decrement = 0.001 pass 3)
G01 Z-0.1
G32 X0.997 Z-0.0991 F0.076923   NOW YOU'LL GET A COMBINATION G32 "TAPERED" MOVE FROM THE
G32 X0.997 Z1 F0.076923            PRIOR G00 X1 POSTION AT  SOME  FEED RATE TO .997 ( THERE IS NO CUTTING) 
G01 X1.1 Z1 F0.076923
G00 X1.1 Z-0.1
G00 X1   

                                                 THIS MOVE CYCLE SEEMS BACK TO NORM IF RPM IS STABLE. THREADING WILL
                                                 CONTINUE.             
(Min decremant being used)
(Decrement = 0.001 pass 4)
G01 Z-0.1
G32 X0.996 Z-0.0988 F0.076923
G32 X0.996 Z1 F0.076923
G01 X1.1 Z1 F0.076923
G00 X1.1 Z-0.1
G00 X1

ANYTHING ELSE YOU NEED GIVE A YELL AND I'LL TRY TO DO.

RICH


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